<style>
    /* 精简、合并样式，去除冗余，蓝色风格 */
    *{margin:0;padding:0;box-sizing:border-box;font-family:system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;}
    body{background:#f5f9ff;color:#1a2b4c;line-height:1.5;}
    a{text-decoration:none;color:inherit;}
    .container{max-width:1280px;margin:0 auto;padding:0 24px;}
    /* 头部 */
    .site-header{background:#0a2540;color:white;padding:16px 0;border-bottom:4px solid #1e88e5;}
    .header-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;}
    .logo a{font-size:1.8rem;font-weight:700;letter-spacing:-0.5px;color:white;display:flex;align-items:center;gap:6px;}
    .logo span{background:#1e88e5;padding:4px 10px;border-radius:40px;font-size:0.9rem;margin-left:6px;}
    .nav-menu{display:flex;gap:32px;font-weight:500;}
    .nav-menu a{padding:6px 0;border-bottom:2px solid transparent;transition:0.2s;color:#e0edff;}
    .nav-menu a:hover{border-bottom-color:#1e88e5;color:white;}
    /* 按钮 */
    .btn{display:inline-block;background:#1e88e5;color:white;font-weight:600;padding:12px 32px;border-radius:60px;border:none;cursor:pointer;transition:0.2s;box-shadow:0 8px 16px rgba(30,136,229,0.2);border:1px solid rgba(255,255,255,0.1);}
    .btn-large{padding:16px 42px;font-size:1.2rem;}
    .btn-outline{background:transparent;border:2px solid #1e88e5;color:#1e88e5;box-shadow:none;}
    .btn-outline-light{background:transparent;border:2px solid white;color:white;box-shadow:none;}
    .btn:hover{transform:translateY(-2px);background:#0f6bc2;}
    .btn-outline:hover{background:#1e88e5;color:white;}
    /* 版块 */
    section{padding:70px 0;}
    .section-title{font-size:2.2rem;font-weight:700;margin-bottom:16px;color:#0a2540;}
    .section-sub{font-size:1.2rem;color:#406e9e;margin-bottom:48px;}
    .text-center{text-align:center;}
    /* 下载英雄区 */
    .hero-download{background:linear-gradient(145deg, #0a2540 0%, #1a3a5f 100%);color:white;padding:80px 0;border-radius:0 0 60px 60px;margin-bottom:20px;}
    .hero-title{font-size:3.2rem;font-weight:800;line-height:1.2;margin-bottom:24px;}
    .hero-desc{font-size:1.3rem;opacity:0.9;max-width:800px;margin:0 auto 40px;}
    .btn-group{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
    .stats-mini{display:flex;justify-content:center;gap:50px;margin-top:48px;flex-wrap:wrap;}
    .stat-item{text-align:center;}
    .stat-num{font-size:2.5rem;font-weight:800;color:#90caf9;}
    /* 优势卡片 */
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}
    .card{background:white;border-radius:28px;padding:30px 24px;box-shadow:0 12px 30px rgba(0,0,0,0.05);border:1px solid #eef4ff;transition:0.2s;}
    .card:hover{box-shadow:0 20px 35px rgba(30,136,229,0.08);}
    .card-icon{font-size:2.5rem;margin-bottom:20px;}
    .card h3{font-size:1.5rem;margin-bottom:12px;color:#0a2540;}
    .feature-list{list-style:none;margin-top:16px;}
    .feature-list li{margin:8px 0;display:flex;align-items:center;gap:8px;}
    .check{color:#1e88e5;font-weight:bold;}
    /* 功能与技术 */
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}
    .func-item{background:white;border-radius:24px;padding:28px;box-shadow:0 5px 20px rgba(0,0,0,0.02);border-left:6px solid #1e88e5;}
    .tech-show{background:#0a2540;color:white;border-radius:40px;padding:50px 40px;}
    .steps{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;margin-top:30px;}
    .step{flex:1;min-width:180px;background:#f0f7ff;border-radius:20px;padding:30px 20px;text-align:center;}
    .step-num{background:#1e88e5;width:48px;height:48px;border-radius:48px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;color:white;font-weight:bold;font-size:1.5rem;}
    /* 平台下载卡片 */
    .platform-grid{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;margin:40px 0;}
    .platform-item{background:white;padding:24px 30px;border-radius:30px;min-width:140px;box-shadow:0 8px 18px rgba(0,0,0,0.03);border:1px solid #d9eaff;}
    /* faq折叠 */
    .faq-list details{border-bottom:1px solid #cbdbe9;padding:16px 0;}
    .faq-list summary{font-weight:600;font-size:1.1rem;cursor:pointer;list-style:none;display:flex;align-items:center;gap:10px;}
    .faq-list summary::-webkit-details-marker{display:none;}
    .faq-list summary::before{content:"Q";background:#1e88e5;color:white;width:28px;height:28px;border-radius:28px;display:inline-flex;align-items:center;justify-content:center;font-weight:bold;margin-right:12px;flex-shrink:0;}
    .faq-list .answer{padding:12px 0 8px 52px;color:#2c3e5c;}
    /* footer */
    .site-footer{background:#0a1a2b;color:#b0c7e0;padding:48px 0 24px;margin-top:40px;}
    .footer-nav{display:flex;flex-wrap:wrap;gap:60px;margin-bottom:30px;}
    .footer-col h4{color:white;margin-bottom:16px;}
    .footer-col ul{list-style:none;}
    .footer-col li{margin:8px 0;}
    .footer-col a{color:#b0c7e0;}
    .footer-col a:hover{color:white;}
    .hashtags{margin:24px 0;color:#6f9fd3;word-break:break-all;}
    .copyright{border-top:1px solid #1e3a5f;padding-top:24px;text-align:center;font-size:0.9rem;}
    /* 响应式 */
    @media (max-width:900px){
      .grid-4{grid-template-columns:repeat(2,1fr);}
      .grid-3{grid-template-columns:1fr;}
      .hero-title{font-size:2.4rem;}
      .section-title{font-size:1.8rem;}
    }
    @media (max-width:600px){
      .header-inner{flex-direction:column;gap:16px;}
      .grid-4{grid-template-columns:1fr;}
      .stats-mini{gap:25px;}
    }
    /* 工具 */
    .mt-4{margin-top:24px;}
    .mb-2{margin-bottom:12px;}
    .text-blue{color:#1e88e5;}
  </style>